Comparative Analysis of Implementation of SVPWM for Three phase Voltage Source Inverter in Linear and Over modulated regions

In this paper Space Vector Pulse Width Modulation for three phase voltage source is implemented both in Linear and Over-modulated regions. The maximum sinusoidal output is reached if the reference is equal to 1/√3Vdc, and the trajectory is a circle inscribed inside the hexagon which is called Linear Modulation range. If reference is more than this value, then it is called Over modulation range. In both the regions, SVPWM is implemented using MATLAB and results are compared

Hydrogen storage and the 18-electron rule

We show that the 18-electron rule can be used to design new organometallic systems that can store hydrogen with large gravimetric density. In particular, Ti containing organic molecules such as C4H4, C5H5, and C8H8 can store up to 9wt% hydrogen, which meets the Department of Energy target for the year 2015. More importantly, hydrogen in these materials is stored in molecular form with an average binding energy of about 0.55eV∕H2 molecule, which is ideal for fast kinetics. Using molecular orbitals we have analyzed the maximum number of H2 molecules that can be adsorbed as well as the nature of their bonding and orientation. The charge transfer from the H2 bonding orbital to the empty dxy and dx2−y2 orbitals of Ti has been found to be singularly responsible for the observed binding of the hydrogen molecule. It is argued that early transition metals are better suited for optimal adsorption/desorption of hydrogen

Port side tubercular abscess in women after lap-diagnosis for infertility

Infertility whether primary or secondary is an emotional and financial burden to the concerned family. In India we occasionally deal with financial constraints of the women undergoing treatment for infertility. Women getting post procedure port site tubercular abscess further makes the situation worse leading to long term burden of drug intake which could have been avoided by proper knowledge and use of sterilization technique of laparoscopic instruments.

Stuck situations in morbidly adherent placenta: how to tackle?

Background: Morbidly adherent placenta is associated with high maternal morbidity and mortality. Its increased prevalence seems to be proportional to the increasing number of caesarean sections. In this study the presentation and management of 32 cases was reviewed with morbidly adherent placenta and maternal and perinatal outcomes from 2014 to 2016, at the hospital.Methods: Study type was retrospective. We reviewed clinical information from patients’ case sheets regarding the risk factors, preparations prior to cesarean section, intraoperative and postoperative complications. Results were interpreted and conclusions were withdrawn.Results: Among the 32 cases, 28 were diagnosed prenatally while 4 were diagnosed intraoperatively. Out of 28 patients, 5 patients were diagnosed early between 14 and 18 weeks of gestational age and other 23 were diagnosed during third trimester by ultrasonography. Caesarean hysterectomy was required in 28 cases.4 were managed conservatively, out of which hysterectomy proved to be necessary in the postpartum period because of severe secondary postpartum hemorrhage in 2 cases. Average no of hospital stay is 10 days ranging from 8-18 days.Conclusions: Prenatal diagnosis of morbidly adherent placenta is essential to plan for the better maternal and perinatal outcome. The decision to perform a cesarean hysterectomy or conservation of uterus (using balloon tamponade or putting haemostatic sutures) is based on the extent of infiltration, the patient’s hemodynamic status, and her desire for future pregnancy. The risk of infection and severe hemorrhage remains high if conservative management is chosen and requires prolonged close monitoring postoperatively. Ideally all the cases should be electively planned and operated by senior surgeon and experienced assistants with senior anesthetist, urosurgeon and physician, with full backup of ICU and blood bank.

Current Role of Adjuvant Therapy in High Risk for Recurrence Resected Kidney Cancer

Renal cell carcinoma accounts for about 2% of all adult malignancies. More than 300,000 individuals are affected each year. Unfortunately, around 30% of cases are discovered in advanced stages. Surgical resection remains the mainstay of treatment for localized disease and relapses can reach up to 40% in some cases. The effective treatment of metastatic RCC with systemic targeted therapy gives a strong rationale for its use as adjuvant treatment in high-risk patients. This chapter reviews different modalities that have been used as an adjuvant therapy for nonmetastatic renal cancer. Clinical trials using targeted therapy are discussed in detail, as they are becoming options for treatment in high-risk patients. While the current set of completed adjuvant clinical trials have provided conflicting results, there are additional large-scale trials that are still in progress. Future directions include—incorporating a genetic recurrence score to evaluate risk of relapse in patients, developing an adequate and an objective standardized adjuvant trial design, identifying novel biomarkers, and evaluating novel drug targets. Based upon current clinical trial evidence, motivated high-risk patients should have a discussion with the urology oncology team regarding the benefits of adjuvant TKI sunitinib or consider enrollment in current ongoing immuno-oncology (IO) adjuvant clinical trials